/**
 * @author alteredq / http://alteredqualia.com/
 * @author mr.doob / http://mrdoob.com/
 */

requirejs(['js/three.min.js'], function() {
	Detector = {

		canvas : !!window.CanvasRenderingContext2D,
		webgl : (function() {
			try {
				return !!window.WebGLRenderingContext && !! document.createElement('canvas').getContext('experimental-webgl');
			} catch( e ) {
				return false;
			}
		} )(),
		workers : !!window.Worker,
		fileapi : window.File && window.FileReader && window.FileList && window.Blob,

		getWebGLErrorMessage : function() {

			var element = document.createElement('div');
			element.id = 'webgl-error-message';
			element.style.fontFamily = 'monospace';
			element.style.fontSize = '13px';
			element.style.fontWeight = 'normal';
			element.style.textAlign = 'center';
			element.style.background = '#fff';
			element.style.color = '#000';
			element.style.padding = '1.5em';
			element.style.width = '400px';
			element.style.margin = '5em auto 0';

			if (!this.webgl) {

				element.innerHTML = window.WebGLRenderingContext ? ['Your graphics card does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000">WebGL</a>.<br />', 'Find out how to get it <a href="http://get.webgl.org/" style="color:#000">here</a>.'].join('\n') : ['Your browser does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000">WebGL</a>.<br/>', 'Find out how to get it <a href="http://get.webgl.org/" style="color:#000">here</a>.'].join('\n');

			}

			return element;

		},

		addGetWebGLMessage : function(parameters) {

			var parent, id, element;

			parameters = parameters || {};

			parent = parameters.parent !== undefined ? parameters.parent : document.body;
			id = parameters.id !== undefined ? parameters.id : 'oldie';

			element = Detector.getWebGLErrorMessage();
			element.id = id;

			parent.appendChild(element);

		}
	};
});
